I currently just have an iMac but what I'd like to do is create a redundant disk array that is boot-able and or store date with a Unix kind of "discretionary access control"
I have used Carbon Copy and rsync to move data from disk to disk, but that is time consuming and error prone. Time Machine does meet the needs.
I had hoped Drobo would be a viable solution but it isn't boot-able, and I've heard about issues with their MacOS support.
The solution should be under $1000 and be expandable.